I also noticed the 249.99 price drop at the Sterling Costco. There were 2 of them out earlier today. If you are looking to get a slim this looks like a great deal.
I too got an e-card too, mine was for $25. $15 from Halo and $10 from Bioshock 2. I wasn't upset about the backordered and eventually canceled order to begin with so getting $25 refunded to paypal and another $25 gift card for something I expected to happen anyway is awesome!
Wow, just got back from the Kmart in Herndon, VA and in addition to the already great deal on L.A. Noire there was also a store-wide deal to save an additional $10 off of any purchase over $50 for today only (5/20). Counting tax I got Noire, ODST, and the $20 credit for just $52.50.